Question

Unpolarized light falls on two polarizing sheets so oriented that no light is transmitted. If a third polarizing sheet is placed between them; not parallel to either of the above two sheets in question:

• A. no light is transmitted
• B. some light is transmitted
• C. light may or may not be transmitted
• D. certainly 50% light is transmitted

Answer 1

The correct option is B some light is transmitted

When a polarizing sheet is placed between two polarizing sheets then certain light is passed through because it is not oriented along either of the polarizing sheets.
$I=I_{0}co{s}^2\theta$
$\theta$ is neither 0 nor $\pi /2$ thus some Intensity is transmitted.